Game site-60 min. download, but if you do not exit the game you can play it FOREVER?

I saw a question on here age ago about game codes. Someone answered - they recommended you download games from 2 different game sites. One was POGO. I cannot remember the other one. Even though you are supposed get 60 minutes, you can play forever as long as you do not exit the game. Also, if you 'illegally' shut down your computer, you only lose 5 minutes per shut down. Does anyone know any other sites you can do that on?